blank image issue on multiple req

controller.py

@@ -151,10 +151,11 @@ def groq_chat(csv_url: str, question: str):
 
         try:
             # Delete cache file if exists
-            cache_db_path = "/workspace/cache/cache_db_0.11.db"
+            cache_db_path = "/app/cache/cache_db_0.11.db"
             if os.path.exists(cache_db_path):
                 try:
                     os.remove(cache_db_path)
+                    print(f"Deleted cache DB file: {cache_db_path}")
                 except Exception as e:
                     print(f"Error deleting cache DB file: {e}")
 
@@ -596,6 +597,14 @@ def groq_chart(csv_url: str, question: str):
     for attempt in range(len(groq_api_keys)):
         try:
             # Instead of deleting a global cache file, you might later configure a per-request cache.
+            cache_db_path = "/app/cache/cache_db_0.11.db"
+            if os.path.exists(cache_db_path):
+                try:
+                    os.remove(cache_db_path)
+                    print(f"Deleted cache DB file: {cache_db_path}")
+                except Exception as e:
+                    print(f"Error deleting cache DB file: {e}")
+                    
             data = clean_data(csv_url)
             with current_groq_chart_lock:
                 current_api_key = groq_api_keys[current_groq_chart_key_index]